Pith Number

pith:IZ5WUD72

pith:2026:IZ5WUD723UJZYHVNKZH5KMMKE3

not attested not anchored not stored refs pending

Evaluating the Evaluator: Problems with SemEval-2020 Task 1 for Lexical Semantic Change Detection

Bach Phan-Tat, Dirk Geeraerts, Dirk Speelmana, Kris Heylen, Stefano De Pascale

SemEval-2020 Task 1 for lexical semantic change detection has narrow definitions of change, corpus preprocessing errors, and limited target sets that make it a partial rather than definitive benchmark.

arxiv:2604.13232 v2 · 2026-04-14 · cs.CL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IZ5WUD723UJZYHVNKZH5KMMKE3}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

Taken together, these limitations suggest that the benchmark should be treated as a useful but partial test bed rather than a definitive measure of progress.

C2weakest assumption

That the listed corpus and preprocessing problems (OCR noise, malformed characters, truncated sentences, inconsistent lemmatisation, POS-tagging errors, missed targets) substantially distort model behaviour, complicate linguistic analysis, and reduce reproducibility.

C3one line summary

The SemEval-2020 Task 1 benchmark for lexical semantic change detection is limited by a narrow sense-based definition of change, substantial corpus and preprocessing errors, and small curated target sets that reduce realism.

Receipt and verification

First computed	2026-05-28T01:04:40.066161Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

467b6a0ffadd139c1ead564fd5318a26e07c2f3dbe36350eadc5ff5c4cf7e178

Aliases

arxiv: 2604.13232 · arxiv_version: 2604.13232v2 · doi: 10.48550/arxiv.2604.13232 · pith_short_12: IZ5WUD723UJZ · pith_short_16: IZ5WUD723UJZYHVN · pith_short_8: IZ5WUD72

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/IZ5WUD723UJZYHVNKZH5KMMKE3 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 467b6a0ffadd139c1ead564fd5318a26e07c2f3dbe36350eadc5ff5c4cf7e178

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "818417c178bc70c93a0c9c434c5071f97abd289d8b567722eaeafb8af2ab8db8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-04-14T19:01:25Z",
    "title_canon_sha256": "cf7530a3a7ba7f8e577050b2b5d5d6f841ff0018cbed7df1657c0aed2bfc7ce9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.13232",
    "kind": "arxiv",
    "version": 2
  }
}